<template>
    <el-container class="home-container">
        <!--头部区域-->
        <el-header>
            <div>
                <img src="../assets/heima.png" alt="">
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <!--页面主体区域-->
        <el-container>
            <!--侧边栏-->
            <el-aside :width="isCollapse ? '64px' :'200px'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <!--侧边栏菜单区域-->
                <el-menu
                        background-color="#333744"
                        text-color="#fff"
                        active-text-color="#409EFF"
                        unique-opened
                        :collapse=isCollapse
                        :collapse-transition="false"
                        router
                        :default-active="activePath">
                    <!--一级菜单-->
                    <el-submenu
                            :index="item.id + ''"
                            v-for="item in menulist"
                            :key="item.id">
                        <!--一级菜单的模板区域-->
                        <template slot="title">
                            <!--图标-->
                            <i :class="iconObj[item.id]"></i>
                            <!--文本-->
                            <span>{{item.authName}}</span>
                        </template>
                        <!--二级菜单-->
                        <el-menu-item
                                :index="'/'+subItem.path + ''"
                                v-for="subItem in item.children"
                                :key="subItem.id" @click="saveNavState('/'+subItem.path)">
                            <template slot="title">
                                <!--图标-->
                                <i class="el-icon-menu"></i>
                                <!--文本-->
                                <span>{{subItem.authName}}</span>
                            </template>
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <!--右侧内容主体-->
            <el-main>
            <!--路由占位符-->
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>

<script>
    export default {
        data() {
          return {
          //    左侧菜单数据
              menulist:[],
              iconObj:{
                  '125':'iconfont icon-user',
                  '103':'iconfont icon-tijikongjian',
                  '101':'iconfont icon-shangpin',
                  '102':'iconfont icon-danju',
                  '145':'iconfont icon-baobiao',
              },
              //是否折叠
              isCollapse:false,
              //被激活的链接地址
              activePath:''
          }
        },
        created() {
            this.getMenuList()
            this.activePath = window.sessionStorage.getItem('activePath')
        },
        methods:{
            logout(){
                window.sessionStorage.clear();
                this.$router.push('/login')
            },
        //    获取所有的菜单
            async getMenuList() {
                const {data:res} = await this.$http.get('menus')
                if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
                this.menulist = res.data
                console.log(res)
            },
            //点击按钮，切换菜单的折叠与展开
            toggleCollapse(){
                this.isCollapse = !this.isCollapse
            },
            //保存链接的激活模式
            saveNavState(activePath){
                window.sessionStorage.setItem('activePath',activePath)
                this.activePath = activePath
            }
        }
    }
</script>

<style lang="less" scoped>
    .home-container{
        height: 100%;
        .el-header{
            background-color: #373d41;
            display: flex;
            justify-content: space-between;
            padding-left: 0;
            align-items: center;
            color: #fff;
            font-size: 20px;
            >div{
                display: flex;
                align-items: center;
                span{
                    margin-left: 15px;
                }
            }
        }
        .el-aside{
            background-color: #333744;
            .el-menu{
                border-right: none;
            }
        }
        .el-main{
            background-color: #eaedf1;
        }
        .iconfont{
            margin-right: 10px;
        }
        .toggle-button{
            background-color: #4A5064;
            font-size: 10px;
            line-height: 24px;
            color: #fff;
            text-align: center;
            letter-spacing: 0.2em;
            cursor:pointer;
        }
    }
</style>